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Targeted attacks via email – phishing for WoW gold

You’re going to be seeing a lot of discussion about email addresses stolen from ESPs in the next few days, if you haven’t already. There are a lot of interesting things to discuss about that from an email perspective – from “Why two factor authentication isn’t a magic bullet.” to “And this is why corporate spam folders can be a major security risk.”
We could have fodder for blog content for weeks!
Right now I’m just going to look at one of the reasons why it’s worth stealing a list of email addresses from an ESP or a list owner, rather than just gathering them from other sources. That is, why the ESPs and list owners are high value targets beyond just “that’s where the email addresses are“.
If you steal a list of addresses from a list owner, or a bunch of lists from an ESP, you have one very useful extra piece of information about the recipients beyond the usual name-and-email-address. You know a company that the recipient is already expecting to receive email from.
That means that you know someone you can pretend to be in order to get a recipient to open and respond to a malicious email you send them – which will make an attempt to phish someones credentials or compromise their computer via email much more likely to be effective.
A good example of targeted phishing for credentials is the online game World of Warcraft. There’s a huge criminal underground that makes real world money by selling game money to players. The main thing the gold sellers need to have to be able to acquire game money, advertise their services to players and to give game money to players in return for dollars is an endless series of World of Warcraft accounts. Blizzard, the World of Warcraft owner, work reasonably hard to squash those accounts and make it slightly tricky for the gold sellers to sign up for them, so stealing account credentials from existing users is a great way to get them. And you can also strip those accounts bare of in-game possessions and gold in the process.
Some of the phishing is done in the game itself, where you know that everyone has an account you can steal if you can just get them to visit your website and compromise their machine…

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Domain Assurance by Return Path

As often happens during MAAWG, email companies are announcing new products. One of the interesting ones is the new Domain Assurance product from Return Path.

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Time for a real security response

I’ve seen a number of people and blogs address the recent breaches at some large ESPs make recommendations on how to fix things. Most of them are so far from right they’re not even wrong.
One group is pointing at consumers and insisting consumers be taught to secure their machines. But consumers weren’t compromised here.
Another group is pointing to senders and insisting senders start authenticating all their email. But the failure wasn’t in authentication and some of the mail is coming through the ESP systems and is authenticated.
Still others are claiming that ISPs need to step up their filtering. But the problem wasn’t with the ISPs letting too much email through.
The other thing that’s been interesting is to watch groups jump on this issue to promote their pet best practices. DKIM proponents are insisting everyone sign email with DKIM. Extended SSL proponents are insisting everyone use extended SSL. But the problem wasn’t with unsigned email or website trust.
All of these solutions fail to address the underlying issue:
ESPs do not have sufficient security in place to prevent hackers from getting into their systems and stealing their customers’ data.
ESPs must address real security issues. Not security issues with sending mail, but restricting the ability of hackers to get into their systems. This includes employee training as well as hardening of systems. These are valuable databases that can be compromised by getting someone inside support to click on a phish link.
Not everyone inside an ESP needs access to address lists. Not everyone inside an ESP customer needs full access to address lists. ESPs must implement controls on who can touch, modify, or download address lists.  These controls must address technical attacks, spear phishing attacks and social engineering attacks.
What’s happening here actually looks a lot like the Comodo certificate attack or the RSA compromise.
It’s time for the ESP industry to step up and start taking system security seriously.

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